stop doing sth停止做某事
The two girls stopped talking when they saw me.
那两个女孩一见到我就停止了讲话.
常用stop sb from doing sth
1.阻止某人做某事
..stop sb.from doing sth.意为“阻止某人做某事”
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2.是阻止某人正在做的事情
听见门铃声,她停下手中的活去开门.stop sb.from doing sth 是阻止某人正在做的事情...e.g.I tried to stop my father from smoking,but failed.
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3.停止某人做某事
stop sb.from doing sth.停止某人做某事...stop doing sth.停止做某事